Journal
PHYSICAL REVIEW E
Volume 84, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.84.041707
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Funding
- Research Foundation-Flanders (FWO) [G.0230.07, 1.5.125.10N]
- E.U.
- K.U.Leuven Research Council
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The phase transition behavior of the liquid crystal dimer alpha,omega-bis(4,4'-cyanobiphenyl)nonane (CBC9CB), which has been reported to exhibit a nematic-nematic phase transition, has been investigated by means of high-resolution adiabatic scanning calorimetry. This nematic-nematic phase transition is weakly first-order with a latent heat of 0.24 +/- 0.01 kJ kg(-1). Mixtures up to 40wt% with 4-pentyl-4'-cyanobiphenyl (5CB) liquid crystals have also been investigated, which also show this nematic to nematic phase transition. The transition stays weakly first-order with a decreasing latent heat with increasing concentration of 5CB. For mixtures with more than 40 wt % uniaxial nematic-unknown nematic phase transition was not observed.
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